EP 0306081 B1 19930623 - APPARATUS FOR SLIT RADIOGRAPHY
Title (en)
APPARATUS FOR SLIT RADIOGRAPHY
Publication
Application
Priority
DE 3728878 A 19870829
Abstract (en)
[origin: JPS6483139A] PURPOSE: To suppress the production of streak by adapting the intensity profile of radiation beams, the relative displacement speed between the beams and a recording medium, and the rotational speed per unit time of a rotary anode X-ray tube so as to compensate intensity fluctuation one another. CONSTITUTION: The focus spot of X rays is located on the inclined annular surface of an anode disk 3, a rotor 9 connected to the disk 3 is driven by a stator 9, and radiation beams 8a and 8b are applied to a patient 6 so that they reach a recording medium 7. Also, the disk 3 is maintained at a specific predetermined rotational speed and the beams 8a and 8b are displaced via a control circuit 12. Then, time for passing the edge part of the intensity profile is made equivalent to the inverse number of speed per unit time of the disk 3 or its integer multiples, thus compensating the intensity fluctuation produced due to the periodical deviation of a focus spot being exposed and hence suppressing streak-shaped artifact.
IPC 1-7
IPC 8 full level
A61B 6/00 (2006.01); G01N 23/04 (2006.01); G03B 42/02 (2006.01); G21K 1/02 (2006.01); G21K 5/00 (2006.01); H05G 1/26 (2006.01); H05G 1/60 (2006.01); H05G 1/66 (2006.01)
CPC (source: EP US)
G01N 23/04 (2013.01 - EP US); G21K 1/025 (2013.01 - EP US); H05G 1/26 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0306081 A2 19890308; EP 0306081 A3 19901212; EP 0306081 B1 19930623; DE 3728878 A1 19890309; DE 3881988 D1 19930729; JP S6483139 A 19890328; US 4894850 A 19900116
DOCDB simple family (application)
EP 88201801 A 19880824; DE 3728878 A 19870829; DE 3881988 T 19880824; JP 21083488 A 19880826; US 23658588 A 19880825